Hi! I'm south korean windy user and i want to help improve korea rain radar data.
[check this source, official korea government data] for 480km coverage radar data! (http://www.weather.go.kr/weather/images/rader_integrate_480.jsp)
much more coverage than current data, purified image(filtered jitter), but there is about 5~10 min delay than realtime.
also, for the realtime raw image data, [this page](kor government official radar website) might be helpful. some jitter and noise might be included, but it's a rapid data. (http://radar.kma.go.kr/radar/ppi0.do)
Both time info are based on KST(9 hour ahead from UMT), and these data came from 27 radar sites in korea.
if any questions or translations needed, please note it to me. i'll try my best!